Perhaps you should try some spelling variations:
"neutron model artificial neural network" » "neutron femoral artificial neural network", "neutron model artificial neural networks", "neuron model artificial neural network", "neural model artificial neural network"
"neural real artificial neural network" » "neural can artificial neural network", "neural femoral artificial neural network", "neural real artificial neural networks"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("neutron model artificial neural network") or ("neural real artificial neural network"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("neutron model artificial neural network") OR ("neural real artificial neural network")).
• Removing quotes may allow a broader search: (( neutron model artificial neural network ) or ( neural real artificial neural network )).
• Adding a wildcard symbol may retrieve word variants: (("neutron model artificial neural network") or ("neural real artificial neural network"))*.